"It matters because we play in a division where all of a sudden there's rain, there's snow and it's different. I think guys that have big hands can grip the ball better in those environmental situations," Jackson said.

North Dakota State's Carson Wentz, another of the draft's top QBs, measured with 10-inch hands on Thursday. The benchmark for adequacy when it comes to hand size for NFL quarterbacks, though different clubs have different opinions, is said to be in the 9-inch range. As such, Goff's hands won't necessarily be considered small or a liability; they'll just look small compared to those of Wentz.

In one of the few games Goff struggled in his college career, he completed just 3 of 6 passes for 11 yards in a rainstorm in 2013 as a freshman against Oregon. Later that season, Goff was confronted with stiff winds in a road game at Colorado, and struggled in a 41-24 loss.

Another of the draft's signal-callers, Penn State's Christian Hackenberg, also measured with 9-inch hands.

Goff and Wentz are expected to be the first two quarterbacks chosen. In which order they're picked, however, is a matter of greater speculation. Hand size, of course, will be only one of many determining factors, but it's a category that Wentz won -- well, handily -- at the combine on Thursday.